[test] This 'div' element contains a 'span' element with a class of 'cl5' that should appear to have no top or bottom margins, but a 20px right margin and a -5px left margin. If there is [cl5]any increase of line separation in the 'div' element due to the top and bottom margins on the 'span' element, the test has been failed; margins do not affect the height of lines.